Test network connection using java

/**
 * @author lautturi.com
 * Java example:Check whether the network is reachable in java
 */

import java.net.InetAddress;

public class Lautturi {

	public static void main(String[] args) {

        String host="192.168.31.1";
		//String host="localhost";
		//String host="www.lautturi.com";
        try{
            InetAddress ip=InetAddress.getByName(host);
            System.out.println(ip);
            if(ip.isReachable(50)){
                System.out.println("Destination Reached");
            }
            else{
                System.out.println("Destination Unreachable");
            }
        }
        catch (Exception e){
            System.out.println("Invalid domain");
        }
	}
}

output:

/192.168.31.1
Destination Reached